Carbureter.



j197s,7s7.

B. 0.. SMITH.

\ 'OARBUEETER.

APPLICATION FILED DE0.30,1909.

' Patented Dec. 13, 19 10.

2 SHEETS-SHEETI.

'B. 0. SMITH. CARBURETER.

APPLICATION FILED DEG. 30,1909.

978,787. Patented Dec. 18, 1910.

2 SHEETSSHEET 2.

Bernard Q/vi/Mmooeo (i tling device for controlling the feed of the.

BERNARD 0. SMITH, or STANLEY, IOWA: asslelvon or oNE-HALFao s. rnvmng 0F s'rAN'LEmIoWA;

CARBURElTER To all whom Lt may concern:

Be it known that I, BERNARD citizen of the United States of America, re-

siding at Stanley,in the county of Buchanan fuel and which is composed of few parts, all

of which may be readily taken'ap'art to permit cleaning or repairing of the. same. In

connection with'the foregoing, it isconteniplated proyiding-asiinple but effective throtcarbureter so that the speed of the engine may be 11I1 1f0I'm.

4 In carrying out the objects of the inven-- 1 tion enerally stated above, it'will be understood: of course, that the essential features thereof are necessarily susceptible of changes in details and structural arrangements, one

referred and practical embodiment of which is shown in' the accompanying drawings,, .where1n: a

Figure '1 is a view in front elevation of the improved carburete r Fig.- 2 is a vertical sectional view thereof taken on the line 2'2, Fig. 1. Fig. 3 is a top plan view of the lowercasing of the carbureter showing the throttle valve in position thereon. Fig. i is a fragmentary detail view of the lower casing showing the fuel supply thereof.

, Referring to said drawin -s by numerals, it

will be observed that the improved carbureter is composedg primarily .of an upper 1 hav ng an outstanding base flange i 2, an a lower'casing 3 having a similar upbase of easing alidable.

er flange l,said-flanges being ri idly, but detachably held in contact by the olts 5.

v The lower casing 3 provides a mixing 45 chamber 6 hav ng an open bottom that is provided with. threads 7 for the reception of a closure plug 8 that has a pendent centrally located nut sha ed lug 9 so that.it may be readil graspe remove said p ug from engagement wlth the 3 when necessary or desirable. Said lug 911% a central guide opening 10 formed through it that also extends through the plug 8' and in which a valve stem 11 is "Said stem 11 carries a valvel2 that 0. SMITH, a

' is seated to prevent a ,vacuum being created.

by'aturning tool to 1 open end t peci c of ett r e r PatentedDed'13,1910.;' Application filed December 30,1909. Semi ao;j 5 5,581; I

a many inagt'afa s a-i1131am? 1 inner end. of an" air supply tube 14, by. ,1 means of a spring lfg coiled about stemvll and having. one end bearing againshvalve 15 i 12 and itsother end bearing against lug 8.

Said valve is provided with a plura ity of small openings 16 so thatsufiicient air may be passed through the same when the valve in chamber 6.. The airsupply tube projcts beyond the interior of easing 3 and is open to the atmosphere as is usual.

A fuel supply passage communicating with valve sea will be sealed when the valve is ,seated, the.,

1-, 13 so many r;

17i has one end i a other end of said passage communicat ng; w th a valve chamber 18 in which a needle valve 19 is mounted for-controlling'the outlet therefrom. Said chamber'communicates with a threaded inlet opening 20 with which,

a fuel feeding pipe 21is in-threaded Yen gagernent.

A plate gg-lextendsl 5 teplof ca s-v 'ing 3 and isprovided with avthickened up-li f standing central lug 23 through whichan opening 24 is formed that affords 'communi .1 I cation between casin s I and 3, so that the 1 air that flows throng the opeuingsof'valve 12 may have access to casing 1. a The lug 23 1 of plate 22 is surrounded byopeni'ngs 25';

An annular throttle valve 2'5 provided with I; openings 27 hasanopen center 28 that'is fitted-over said lug 23; The periphery of" said valve 26 extends into a guide opening 29 formed in the baseof casing 1,- and said valve is provided with' an operating lever 30 that projects through a slot 31 in flange 2 and has an eye 32 formed in its outer end' so that it ma be connected to a governor, not shown. heopenings 27 of :valve 26' correspond in number and arrangement with the openings 25' of plate 22, so' that When lever 30 is manipulated the flow of fuel through said openings 25 and 27 may be regulated to vary thespeed of the engine. Indicating marks such as 1, 2 and 3 ma v be formed on flange 4 of easing 3 beneath lever 30 to indicate the relative ositions of openings 25-27 when the lever is either tothe right or the left of slot 31.

The up er portion of easing 1 has an liat is surrounded by a flat flange 33 having bolt openings 3 1 formed through it so that it may be fastened over the usual feed opening of an engine cylinder, not

showm Said open end is also provided with a valve seat 35 for an outwardly opening valve 36 whose stem 37 projects through a gland 38 that projects inwardly from the rear end of the upper portion of the casing 1. Said stem projects well beyond said rear end of the casing 1 and has an adjustable head 39 that forms an abutment for one end of a spring 40 coiled about the outer portion of the stem and whose other end bears against the end of casing 1, the tension of said spring being sufficient to normally retain valve 36 to its seat. a

In operation, the parts being in the position shown in Fig. 1, it Will be seen that the pulsations of the engine will unseat valve 36 against the tension of spring 40 and create a suction in mixing chamber 6 that will unseat valve 12 against the tQIISIQII Of spring .15 and thereby draws the fuel and air through mixing chamber 6 and openings 25-27 through casing l to the engine. Obviously valves 12 and 36 will automatically return to their seats when the suction ceases.

It will be understood that lever 30 may be manually manipulated to control the supply of fuel if desired, or in the event of a governor not being employed.

It will be seen from the foregoing that the upper casing may be readily removed from the engine to permit access to be had to valve .36, and that the two casings may be readily separated so that the upper casing may be thoroughly cleaned and also to give access to throttle valve 26. Also that the fuel pipe may be removed fr'm casing 3 as well as the bottom closure, thereby permitting-a thorough cleaning of said casing 3 and all its adjuncts to be made.

What I claim as my invention is 1. A carbureter comprising a. lower fuel mixing casing, an upper casing detachably fastened thereto and provided with a discharge outlet, means for controlling the supply of fuel from the lower casin to the upper casing, a guiding gland pro ectin into said upper casing, a valve stem slidable through said gland and projecting beyond the casing and provided with a head on the outer portion, a valve on said stem for sealing the discharge outlet of said upper casing, and a spring coiled about said stem and bearing against the exterior of the upper casing and said head to yieldably hold said outlet valve in a closed position.

2. A earbureter comprising a lower casing, a detachable bottom closure therefor, an air supply tube communicating with the atmosphere and having its inner end arranged above said closure and provided with a valve seat, a valve stem slidable through said do sure, a valve carried thereby, a spring coiled about said stem for yieldably holdin said valve to said seat, means for 'feeding fuel to said lower casing, an upper casin connected to said lower casmg, and means or controlling the communication between said lower casing, and said upper casing. 3. A carbureter comprising a mixing chamber, a bottom plu therefor, an air supply tube entering said casing and overhanging said plug, a valve slidably supported by said plug, means for normally holding said valve in sealing engagement with the overhanging ends of said tube, a discharge casing in communication with the mixing casing means for controlling the communication between said casing, and means for controlling the outlet of said discharge casing.

In testimony whereof I hereunto aflix my signature in presence of two witnesses.

BERNARD 0. SMITH.

Witnesses:

GEO. J. HILL, F. D. JENNEY 

